The average person will go on a date at least 100 times before they finally marry.
33
Enamel is hardest substance in the human body.
61
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Your heart will pump about 212 million liters in its lifetime.
26
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
A person can live without food for about a month, but only about a week without water.
156
The average sperm cell swims at 8 inches per hour.
4
Pain occurs when sounds are above 130 db.
124